they in a statement on their website regarding supplying binders;
Binders
Some trans masculine, non-binary and gender diverse people experience bodily dysphoria, as a result of their chest, and binding, for some, helps alleviate that distress. Mermaids takes a harm reduction position with the understanding that providing a young person with a binder and comprehensive safety guidelines from an experienced member of staff is preferable to the likely alternative of unsafe practices and/or continued or increasing dysphoria. The risk is considered by Mermaids staff within the context of our safeguarding framework. More on binder safety can be found here.
mermaidsuk.org.uk/news/statement-in-response-to-a-telegraph-article-published-sunday-25-september/
HOWEVER I am almost sure that I have seen research that shows there are actually more harmful effects experiences when wearing commercial binders, compared with home made solutions? is this the case?